Since the end of the second world war, all eyes have been on Russia. Yet Trump’s increasingly erratic, hostile presidency is shattering old assumptions

One of the things that the depleted, often denigrated British state is still pretty good at is persuading the public that another country is a threat. As a small, warlike island next to a much larger land mass, Britain has had centuries of practice at cultivating its own sense of foreboding. Arguably, preparing for conflict with some part of the outside world is our natural mindset.

Warnings about potential enemy countries are spread by our prime ministers and major political parties, intelligence services and civil servants, serving and retired military officers, defence and foreign affairs thinktanks, and journalists from the right and the left. Sometimes, the process is relatively subtle and covert: reporters or MPs are given off-the-record briefings about our “national security” – a potently imprecise term – facing a new threat.

Andy Beckett is a Guardian columnist